<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>
  </head>
  <body>
    <div id="app"></div>
    <script type="text/babel">
      class App extends React.Component {
        render() {
          return (
            <div>
              <input type="text" id="ipt" />
              <button onClick={this.getValue}>点我打印输入框的内容</button>
            </div>
          );
        }
        getValue = () => {
          const oIpt = document.getElementById("ipt");
          console.log(oIpt.value);
        };
      }
      ReactDOM.createRoot(document.getElementById("app")).render(<App />);
    </script>
  </body>
</html>
